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Date: Sat, 5 May 2018 12:36:36 +0200
From: Salvatore Mesoraca <>
To: Florian Fainelli <>
Cc: Vivien Didelot <>,, 
	Kernel Hardening <>,, 
	"David S. Miller" <>, Andrew Lunn <>, Kees Cook <>
Subject: Re: [PATCH] net: dsa: drop some VLAs in switch.c

2018-03-13 21:06 GMT+01:00 Florian Fainelli <>:
> On 03/13/2018 12:58 PM, Vivien Didelot wrote:
>> Hi Salvatore,
>> Salvatore Mesoraca <> writes:
>>> dsa_switch's num_ports is currently fixed to DSA_MAX_PORTS. So we avoid
>>> 2 VLAs[1] by using DSA_MAX_PORTS instead of ds->num_ports.
>>> [1]
>>> Signed-off-by: Salvatore Mesoraca <>
>> NAK.
>> We are in the process to remove hardcoded limits such as DSA_MAX_PORTS
>> and DSA_MAX_SWITCHES, so we have to stick with ds->num_ports.
> Then this means that we need to allocate a bitmap from the heap, which
> sounds a bit superfluous and could theoretically fail... not sure which
> way is better, but bumping the size to DSA_MAX_PORTS definitively does
> help people working on enabling -Wvla.

Hi Florian,

Should I consider this patch still NAKed or not?
Should I resend the patch with some modifications?

Thank you,


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